/*
 * Jitsi, the OpenSource Java VoIP and Instant Messaging client.
 *
 * Copyright @ 2015 Atlassian Pty Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jitsi.android.gui.menu;

import java.util.*;

import org.jitsi.*;
import org.jitsi.android.gui.widgets.*;

import android.content.*;
import android.graphics.*;
import android.graphics.drawable.*;
import android.view.*;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.*;
import android.widget.PopupWindow.OnDismissListener;

public class GlobalStatusMenu
    implements OnDismissListener
{
    protected Context mContext;
    private LayoutInflater mInflater;
    protected PopupWindow mWindow;
    protected WindowManager mWindowManager;
    protected View mRootView;
    protected Drawable mBackground = null;

    private boolean mDidAction;
    private int mAnimStyle;
    private int mInsertPos;
    private int mChildPos;
    private ViewGroup mTrack;
    private ImageView mArrowUp;
    private ImageView mArrowDown;
    private ScrollView mScroller;
    private OnActionItemClickListener mItemClickListener;
    private OnDismissListener mDismissListener;
    private int rootWidth=0;

    private List<ActionMenuItem> actionItems = new ArrayList<ActionMenuItem>();

    public static final int ANIM_GROW_FROM_LEFT = 1;
    public static final int ANIM_GROW_FROM_RIGHT = 2;
    public static final int ANIM_GROW_FROM_CENTER = 3;
    public static final int ANIM_REFLECT = 4;
    public static final int ANIM_AUTO = 5;

    public GlobalStatusMenu(Context context)
    {
        mContext = context;
        mWindow = new PopupWindow(context);

        mWindow.setTouchInterceptor(new OnTouchListener()
        {
            public boolean onTouch(View v, MotionEvent event)
            {
                if (event.getAction() == MotionEvent.ACTION_OUTSIDE)
                {
                    mWindow.dismiss();

                    return true;
                }

                return false;
            }
        });

        mWindowManager
            = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);

        mInflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        setRootViewId(R.layout.status_menu);

        mAnimStyle  = ANIM_AUTO;
        mChildPos   = 0;
    }

    /**
     * Get action item at an index
     * 
     * @param index  Index of item (position from callback)
     * 
     * @return  Action Item at the position
     */
    public ActionMenuItem getActionItem(int index)
    {
        return actionItems.get(index);
    }

    /**
     * On dismiss
     */
    public void onDismiss()
    {
        if (!mDidAction && mDismissListener != null)
        {
            mDismissListener.onDismiss();
        }
    }

    /**
     * Set root view.
     * 
     * @param id Layout resource id
     */
    public void setRootViewId(int id)
    {
        mRootView   = (ViewGroup) mInflater.inflate(id, null);
        mTrack      = (ViewGroup) mRootView.findViewById(R.id.tracks);

        mArrowDown  = (ImageView) mRootView.findViewById(R.id.arrow_down);
        mArrowUp    = (ImageView) mRootView.findViewById(R.id.arrow_up);

        mScroller   = (ScrollView) mRootView.findViewById(R.id.scroller);

        //This was previously defined on show() method, moved here to prevent force close that occured
        //when tapping fastly on a view to show quickaction dialog.
        //Thanx to zammbi (github.com/zammbi)
        mRootView.setLayoutParams(new LayoutParams(
            LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));

        setContentView(mRootView);
    }

    /**
     * Set listener for action item clicked.
     * 
     * @param listener Listener
     */
    public void setOnActionItemClickListener(OnActionItemClickListener listener)
    {
        mItemClickListener = listener;
    }

    /**
     * Set animation style
     * 
     * @param mAnimStyle animation style, default is set to ANIM_AUTO
     */
    public void setAnimStyle(int mAnimStyle) {
        this.mAnimStyle = mAnimStyle;
    }

    /**
     * On show
     */
    protected void onShow()
    {
    }

    /**
     * On pre show
     */
    protected void preShow()
    {
        if (mRootView == null) 
            throw new IllegalStateException(
                "setContentView was not called with a view to display.");

        onShow();

        if (mBackground == null) 
            mWindow.setBackgroundDrawable(new BitmapDrawable());
        else 
            mWindow.setBackgroundDrawable(mBackground);

        mWindow.setWidth(WindowManager.LayoutParams.WRAP_CONTENT);
        mWindow.setHeight(WindowManager.LayoutParams.WRAP_CONTENT);
        mWindow.setTouchable(true);
        mWindow.setFocusable(true);
        mWindow.setOutsideTouchable(true);

        mWindow.setContentView(mRootView);
    }

    /**
     * Set background drawable.
     * 
     * @param background Background drawable
     */
    public void setBackgroundDrawable(Drawable background)
    {
        mBackground = background;
    }

    /**
     * Set content view.
     * 
     * @param root Root view
     */
    public void setContentView(View root)
    {
        mRootView = root;

        mWindow.setContentView(root);
    }

    /**
     * Set content view.
     * 
     * @param layoutResID Resource id
     */
    public void setContentView(int layoutResID)
    {
        LayoutInflater inflator = (LayoutInflater) mContext
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        setContentView(inflator.inflate(layoutResID, null));
    }

    /**
     * Set listener for window dismissed. This listener will only be fired if
     * the quicakction dialog is dismissed by clicking outside the dialog or
     * clicking on sticky item.
     */
    public void setOnDismissListener(GlobalStatusMenu.OnDismissListener listener)
    {
        mDismissListener = listener;
    }

    /**
     * Dismiss the popup window.
     */
    public void dismiss()
    {
        mWindow.dismiss();
    }

    /**
     * Listener for item click
     *
     */
    public interface OnActionItemClickListener
    {
        public abstract void onItemClick(   GlobalStatusMenu source,
                                            int pos,
                                            int actionId);
    }

    /**
     * Listener for window dismiss
     * 
     */
    public interface OnDismissListener
    {
        public abstract void onDismiss();
    }

    /**
     * Add action item
     * 
     * @param action  {@link ActionItem}
     */
    public void addActionItem(ActionMenuItem action)
    {
        actionItems.add(action);

        String title    = action.getTitle();
        Drawable icon   = action.getIcon();

        View container = mInflater.inflate(R.layout.status_menu_item, null);

        ImageView img   = (ImageView) container.findViewById(R.id.iv_icon);
        TextView text   = (TextView) container.findViewById(R.id.tv_title);

        if (icon != null)
            img.setImageDrawable(icon);
        else
            img.setVisibility(View.GONE);

        if (title != null)
            text.setText(title);
        else
            text.setVisibility(View.GONE);

        final int pos =  mChildPos;
        final int actionId = action.getActionId();

        container.setOnClickListener(new OnClickListener()
        {
            public void onClick(View v)
            {
                if (mItemClickListener != null)
                    mItemClickListener
                        .onItemClick(GlobalStatusMenu.this, pos, actionId);

                if (!getActionItem(pos).isSticky())
                {
                    mDidAction = true;

                    dismiss();
                }
            }
        });

        container.setFocusable(true);
        container.setClickable(true);

        mTrack.addView(container, mInsertPos);

        mChildPos++;
        mInsertPos++;
    }

    /**
     * Show quickaction popup. Popup is automatically positioned, on top or bottom of anchor view.
     * 
     */
    public void show (View anchor)
    {
        preShow();

        int xPos, yPos, arrowPos;

        mDidAction = false;

        int[] location = new int[2];

        anchor.getLocationOnScreen(location);

        Rect anchorRect
            = new Rect( location[0], location[1],
                        location[0] + anchor.getWidth(),
                        location[1] + anchor.getHeight());

        //mRootView.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));

        mRootView.measure(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);

        int rootHeight = mRootView.getMeasuredHeight();

        if (rootWidth == 0)
        {
            rootWidth = mRootView.getMeasuredWidth();
        }

        int screenWidth = mWindowManager.getDefaultDisplay().getWidth();
        int screenHeight = mWindowManager.getDefaultDisplay().getHeight();

        //automatically get X coord of popup (top left)
        if ((anchorRect.left + rootWidth) > screenWidth)
        {
            xPos = anchorRect.left - (rootWidth-anchor.getWidth());
            xPos = (xPos < 0) ? 0 : xPos;

            arrowPos = anchorRect.centerX()-xPos;

        }
        else
        {
            if (anchor.getWidth() > rootWidth)
                xPos = anchorRect.centerX() - (rootWidth/2);
            else
                xPos = anchorRect.left;

            arrowPos = anchorRect.centerX() - xPos;
        }

        int dyTop = anchorRect.top;
        int dyBottom = screenHeight - anchorRect.bottom;

        boolean onTop = (dyTop > dyBottom) ? true : false;

        if (onTop)
        {
            if (rootHeight > dyTop)
            {
                yPos = 15;
                LayoutParams l = mScroller.getLayoutParams();
                l.height = dyTop - anchor.getHeight();
            }
            else
            {
                yPos = anchorRect.top - rootHeight;
            }
        }
        else
        {
            yPos = anchorRect.bottom;

            if (rootHeight > dyBottom)
            {
                LayoutParams l = mScroller.getLayoutParams();
                l.height = dyBottom;
            }
        }

        showArrow(((onTop) ? R.id.arrow_down : R.id.arrow_up), arrowPos);

        setAnimationStyle(screenWidth, anchorRect.centerX(), onTop);

        mWindow.showAtLocation(anchor, Gravity.NO_GRAVITY, xPos, yPos);
    }

    /**
     * Set animation style
     * 
     * @param screenWidth screen width
     * @param requestedX distance from left edge
     * @param onTop flag to indicate where the popup should be displayed. Set
     * TRUE if displayed on top of anchor view and vice versa
     */
    private void setAnimationStyle( int screenWidth,
                                    int requestedX,
                                    boolean onTop)
    {
        int arrowPos = requestedX - mArrowUp.getMeasuredWidth()/2;

        switch (mAnimStyle)
        {
        case ANIM_GROW_FROM_LEFT:
            mWindow.setAnimationStyle((onTop)
                ? R.style.Animations_PopUpMenu_Left
                : R.style.Animations_PopDownMenu_Left);
            break;

        case ANIM_GROW_FROM_RIGHT:
            mWindow.setAnimationStyle((onTop)
                ? R.style.Animations_PopUpMenu_Right
                : R.style.Animations_PopDownMenu_Right);
            break;

        case ANIM_GROW_FROM_CENTER:
            mWindow.setAnimationStyle((onTop)
                ? R.style.Animations_PopUpMenu_Center
                : R.style.Animations_PopDownMenu_Center);
        break;

        case ANIM_REFLECT:
            mWindow.setAnimationStyle((onTop)
                ? R.style.Animations_PopUpMenu_Reflect
                : R.style.Animations_PopDownMenu_Reflect);
        break;

        case ANIM_AUTO:
            if (arrowPos <= screenWidth/4)
            {
                mWindow.setAnimationStyle((onTop)
                    ? R.style.Animations_PopUpMenu_Left
                    : R.style.Animations_PopDownMenu_Left);
            }
            else if (arrowPos > screenWidth/4 && arrowPos < 3 * (screenWidth/4))
            {
                mWindow.setAnimationStyle((onTop)
                    ? R.style.Animations_PopUpMenu_Center
                    : R.style.Animations_PopDownMenu_Center);
            }
            else
            {
                mWindow.setAnimationStyle((onTop)
                    ? R.style.Animations_PopUpMenu_Right
                    : R.style.Animations_PopDownMenu_Right);
            }

            break;
        }
    }

    /**
     * Show arrow
     * 
     * @param whichArrow arrow type resource id
     * @param requestedX distance from left screen
     */
    private void showArrow(int whichArrow, int requestedX)
    {
        final View showArrow
            = (whichArrow == R.id.arrow_up) ? mArrowUp : mArrowDown;
        final View hideArrow
            = (whichArrow == R.id.arrow_up) ? mArrowDown : mArrowUp;

        final int arrowWidth = mArrowUp.getMeasuredWidth();

        showArrow.setVisibility(View.VISIBLE);

        ViewGroup.MarginLayoutParams param
            = (ViewGroup.MarginLayoutParams)showArrow.getLayoutParams();

        param.leftMargin = requestedX - arrowWidth / 2;

        hideArrow.setVisibility(View.INVISIBLE);
    }
}
